stretch cruiser rear wheel dropouts

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My dynos dropouts have been stretched to far apart to the point the axle is misaligned and rear wheel doesn’t sit straight in the dropouts, i’ve had to add an extra nut to the coaster brake arm tire just so the tire would somewhat sit straight

Could somebody possibly point me in the right direction on how to possibly fix this issue?
I keep getting the runaround and I don’t wanna mess it up anymore than it is
 

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Did this bike come with a single speed? If it was new with a wider rear axle, like a 5 speed or more then the width would be greater. To narrow the width, you could remove the wheel and manually squeeze the drops together to match the width of your rear hub. If you do that, then be sure the dropouts are exacty perpendicular to the axle nuts. The may be at a slight angle because they will be closer together. You can make up something to get it just right.
 
My dynos dropouts have been stretched to far apart to the point the axle is misaligned and rear wheel doesn’t sit straight in the dropouts, i’ve had to add an extra nut to the coaster brake arm tire just so the tire would somewhat sit straight

Could somebody possibly point me in the right direction on how to possibly fix this issue?
I keep getting the runaround and I don’t wanna mess it up anymore than it is
Did this bike come with a single speed? If it was new with a wider rear axle, like a 5 speed or more then the width would be greater. To narrow the width, you could remove the wheel and manually squeeze the drops together to match the width of your rear hub. If you do that, then be sure the dropouts are exacty perpendicular to the axle nuts. The may be at a slight angle because they will be closer together. You can make up something to get it just right.

We tried to put a 3 inch rim but it was to thick and was rubbing, so now I’m trying to go back so thank you for the suggestion, I’ll definitely be trying it in the morning!
 
We tried to put a 3 inch rim but it was to thick and was rubbing, so now I’m trying to go back so thank you for the suggestion, I’ll definitely be trying it in the morning!
I’m still having trouble with coaster brake arm mounting area there’s a gap without the small nut I’ve used as a spacer

I’ve tried over and over squeezing the chainstays together,no luck
 

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